How much keyword search volume is need for .cc's to have value?

Hey guys and gals.

.cc's have been doing pretty good lately, but only rich one word domains, or super high keyword names.

I am wondering how much search volume is needed to make the .cc worth anything.

I have JiuJitsu.cc (400,000ish exact monthly search) and DiamondRing.cc, (300,000ish)