10m Air cylinder cc?

I have a Steyr LP2 compact. The cylinder is small and I don't know the actual volume. What I do know is that I get at least 100 shots per fill and that's pretty impressive. Most, if not all of this type pistol, get 100 or more shots, so to me, the volume of the cylinder is immaterial. You can measure one and do a rough calculation and figurre this out yourself. I couldn't find any technical data on the manufacturers website on air volume.