25/50 TPTK vs tay

[KRANTZ]

i dont have the hh cause im reformatting my computer but i figured id post it before i forget

effective stacks are like 5500ish. my image is TAG and this is the only session taylor and i have ever played on FTP. i haven't been out of line at all so far, and this is the first pot we've played. i'm not really sure if he knows it's me but even if he does, i don't think he has a real solid knowledge of how i play.

anyway: i open ATcc UTG to 175. all fold to tay in bb, he calls.

flop: T44r

check, i bet 350, he c/r to 950. call, 3-bet? i called.

turn K (puts up backdoor hearts). he bets 1500 into like 2300ish.

action and why?