1 cubic centimeter/minute = 0.033814 ounce/minute [US]
1 gallon of gasoline equals 5.8 to 6.5 lbs.
1 gallon [US, liquid] = 128 ounce [US, liquid]
Doing some math I find
1 cubic centimeter/minute = .00153 to .00175 lbs/minute or
1 cubic centimeter/minute = .0918 to .1051 lbs/hour
so a 550 CC would do about 550 * .0918 or .1051 = 51 to 58 lbs/hr
hope I did my math right :icon_razz