Blind battle underpair hand

[Leader]

15/30

Villain is 50/14/1.4/38
Notes:
-check flop after pfr with good A - check turn and river
-donk flop c/f turn

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

Flop: 4[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/spade.gif[/img] (2SB, 2 players)
SB checks, <font color="#cc0000">Hero bets</font>, <font color="#cc0000">SB raises</font>, Hero...

I'm still trying to find that balance between folding a bunch of winners and showing down every pair/a-high. A week ago I probably wouldn't have thought much about calling here. Now the board seems drawy and his range seems weak. I'm thinking I should at least take a card off and see if it's any good. Thoughts?