Hero is UTG with AsJs and opens 3bb with a 97BB stack

MP1 calls, MP2 folds, CO raises to 9bb

folds back to Hero who calls, MP1 also calls

Flop comes down 3c 7d 6s

Hero checks, MP1 checks, CO bets 25BB
Hero shoves, MP1 folds, CO calls.

Now, on bovada this is a common thing that fish do, 3bet super light thinking people will fold and then bet large OTF with nothing. My thinking with the call is it really doesn't hit his 3bet range, and the only thing really betting here is over/drawing for overs. Thinking of it now, the bad 3bet sizing could have been someone who had a really high pocket pair, or something like AJ-AK KQ, possibly KJ and QJ. I was right this specific time, and my ace high was good, but I sucked out on the river, so that's probably why I'm making this post anyways. Is this a strategy that I should keep, or is it complete spew?