NL25 KK overpair ip, c/r by tight reg villain

[WantToLearn]

Hi 2+2 - some advice needed! Thank you very much!

<u>Question:</u> What´s the correct reaction to his flop c/r here? How far can we go here?

<u>Reads:</u> villain is tight straihgtforward reg.

PokerStars No-Limit Hold'em, $0.25 BB (8 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($30.25)
Button ($22.70)
SB ($4.65)
BB ($25.15)
UTG ($29.95)
UTG+1 ($11.40)
MP1 ($29.05)
MP2 ($13.75)

Preflop: Hero is CO with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, MP1 calls $0.25, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $1.5</font>, <font color="#666666">3 folds</font>, MP1 calls $1.25.

Flop: ($3.35) 6[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
MP1 checks, <font color="#CC3333">Hero bets $2.85</font>, <font color="#CC3333">MP1 raises to $5.7</font>, Hero ???