yellowsub throws a sick min-raise my way

[LegallyBlind]

Poker Stars
No Limit Holdem Ring game
Blinds: $3/$6
3 players
Converter

Stack sizes:
Button: $600
Hero: $694
BB: $769.25

Pre-flop: (3 players) Hero is SB with A[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">Button raises to $24</font>, <font color="#cc0000">Hero raises to $84</font>, BB folds, Button calls.

Flop: 3[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/spade.gif[/img] ($174, 2 players)
<font color="#cc0000">Hero bets $120</font>, <font color="#cc0000">Button raises to $240</font>,

i don't have much history with sub. he seems to be a very active preflop three-bettor and opens a lot from LP. He rarely has called my three-bets regardless of position (but again, not too many hands with him).

So on the flop, his minraise is sick because of stack sizes and on this flop there probably isn't alot i can call with. So i figure its a great spot to make me make a decision for my stack, without committing his stack.

I dunno if sub has any kind of read of me. But assuming i'm just some random 3/6 peon to him, what shoulud i do?