nl50 how to play this set

[PokerFun007]

PokerStars Pot-Limit Hold'em, $0.50 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG ($63.90)
UTG+1 ($49.25)
MP1 ($38.05)
MP2 ($66.25)
MP3 ($52.30)
CO ($41.40)
Button ($83.30)
Hero ($45.50)
BB ($48.40)

Preflop: Hero is SB with 6[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/club.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">MP2 raises to $1.75</font>, <font color="#666666">3 folds</font>, Hero calls $1.50, BB calls $1.25.

Flop: ($5.25) K[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $3</font>, BB folds, <font color="#CC3333">MP2 raises to $9.5</font>, <font color="#CC3333">Hero ?

I think I should re-raise, but am I thinking of extraction here? If so, how much should it be. It's pot limit, so full pot? Or???

I remember villain is quite aggressive over a small sample of hands -- 8.0 (!)