Even if you pass entirely as male, if people aren't seeing anything which is very obviously cueing male, i.e. a beard, and you're introduced as female and by a female name, and do nothing to correct that, people aren't going to twig onto the fact that you were trans. I've only ever had one person guess that I was trans, and I passed just as consistently as I do now, which is to say, no one I've met since coming out and changing my name knows I've ever been referred to as anything else in my life. Even a trans woman at my work didn't twig why it was the I specifically asked to have a private chat with her until I came out with it.
The only way you're going to stop people misgendering you is, unfortunately, to come out. My friend worked out that I was trans because she knew a fair bit about it anyway and is involved in LGBT stuff, and has been probably the second most supportive person in my life besides my girlfriend. A few weeks before coming out to the remainder of my work cohort (200 people plus 50+ trainers) I came out to one or two other people that I trusted, and then we arranged with my manager that he would make an announcement for me in front of all of them, so they were all at the same page at once, and out of those 200 people I've only ever heard of issues with two people, and they didn't dare do it to my face.
It made so much difference to not have that constant feeling of being stabbed by an icicle every time someone misgendered or named me. I didn't realise how much latent anger I had built up over it until it wasn't there anymore, and then it took a fair few weeks to get used to the calmer, nothing-angers-me-anymore, me, because I'd never experienced that before. Yeah most of them have slipped up a few times since, but it didn't hurt so much when I knew they were all trying and getting it right at least 50% of the time, and gradually as time went on they've got it right more and more often.