I'm assuming he 3bets a decent amount from his position, otherwise I wouldn't advocate 4betting. He's probably floating this flop w/ every hand that he called the 4bet with given your flop betsizing. If you check the turn here, you induce bets sometimes, so when he shoves you need to call I think. Also, if he were value betting this turn, why shove to maximize his fold equity? Plus, your line is strange. Usually when people bet this size on the flop, its to set up a turn/river shove, but you checked, which I believe induces some spazzy plays on the turn after you've bet the flop so small. I'd expect to see some kind of hand that turned more equity (hence the shove to maximize FE)
Edit: this is mostly guess work though, as I don't have any info on villain |