FT 25NL 6max - Two Pair in the BB - Bet Sizing

[shoxbb6]

Villain is 30/19/1 over 150ish hands, most of them datamined.
Hero got his stack before villain sat down, and hasn't played any decent sized pots.
Villain got his stack when he called pre-flop with a suited connector, called a psb on flop with a gutshot in position, called another psb on turn after improving to an oesd, then shoved river after hitting the straight.

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.10/$0.25
6 players
Converter

Pre-flop: (6 players) Hero is BB with J[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/heart.gif[/img]
2 folds, CO calls, Button folds, SB calls, Hero checks.

Flop: 8[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] ($0.75, 3 players)
<font color="#cc0000">SB bets $0.75</font>, <font color="#cc0000">Hero raises to $2.75</font>, CO folds, SB calls.

Turn: 2[img]/images/graemlins/club.gif[/img] ($6.25, 2 players)
SB checks, <font color="#cc0000">Hero bets $4</font>, SB calls.

River: 5[img]/images/graemlins/spade.gif[/img] ($14.25, 2 players)
SB checks, <font color="#cc0000">Hero bets $7</font>