Question 1192098
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{{{ V[cyl] = pi*r^2*h }}}   where  r = 9in,  and h = 2ft = 24in

From this volume, you are removing 1/4 of it.  Thus, your final answer is 
{{{ V = (3/4)pi*r^2*h }}}  

The above will give you cubic inches.  You then need to convert to cubic meters.

1in = 0.0254m -->  {{{ 1in^3 = 0.00001639m^3 }}}  so multiply the answer you get above by this final conversion factor.  One cubic inch is a tiny fraction of a cubic meter,  this should make intuitive sense to you.