simple EV problem

[oreogod]

quick question. Dont quite know if Im doing the math right.

Say u have K3 HU on BB. SB raises. flop is 553r. sb bets, u raise, sb 3bets...Assume we are ahead. and SB has a 6outer. Here is my question:

Is it better in +EV terms to call the flop 3bet and let him fire another 2 on the later streets (aggressive player (but will fold turn if u cap and bet) or should I cap the flop and take the win w/ him folding to my turn bet?

I know on the flop, if we are ahead capping has +ev if we are ahead. But what is the EV to call and call down the last two streets compared to him immediatly folding the turn?