Here's the range I got as close as I could figure it* on Hold 'Em Resources:
* - BB ante isn't an option, so I tried it with an ante and your calling range is slightly wider, but with an ante the calculator assumes the CO will call off any two since they're anteing every hand rather than just the BB ante. So for this range I used no ante, which still has CO calling off 71.9% of hands, which obviously did not happen here.
If you were deeper-- and more clearly in second or third place, say-- I'd imagine the range is significantly tighter. But you only have 14BB anyway.
For the record, though, I decided to look at the hands at the bottom of the calling range and the top of the folding range:
A9s is a call and is 62.78% vs. a random hand.
KJs is a fold and is 62.57% vs. a random hand.
Just to give you an idea that you still need to tighten up a fair bit more than what would be a standard cEV call.