All I could find right now is this : Density = (@ 0 °C, 101.325 kPa) 0.1786 g/L
from wikipedia.
for these conditions,
v = m / p = (2000lbs * A g / 1 lb) L / 0.1786 g
find out how many grams are in 1 lb, and replace that value for A, then solve.
In the UK 1lb = 454 grams