30/60 Dealing with super-aggros

[Poldi]

Villain is 45/40 over 70 hands and very aggressive postflop. It is VERY likely that he is capable of bluffcheck-raising me with air on the turn, but I dont know it for sure and dont know how often he would do this.

Party Poker 30/60 Hold'em (7 handed) converter

Preflop: Hero is BB with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">5 folds</font>, <font color="#CC3333">SB raises</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">SB caps</font>, Hero calls.

Flop: (8 SB) J[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls.

Turn: (5 BB) 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, Hero checks.

River: (5 BB) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls.

Final Pot: 7 BB

I think not betting the turn is bad, but I cant fold to a CR so I took the easy way out. I just didnt have enough info on him.
It´s really unlikely he is just giving up on the turn here.