Titanium Bar Subjected to Tensile Load P = 900 KN

titanium bar ( $( E = 100 \mathrm { GPa } , v =0.33 ) \text { with square cross section } ( b = 75 \mathrm {~mm} ) \text { and length } L = 3.0 \mathrm {~m} \text { is }$ subjected to tensile load P = 900 kN. The increase in volume of the bar is approximately:

A) $1400 \mathrm {~mm} ^ { 3 }$
B) $3500 \mathrm {~mm} ^ { 3 }$
C) $4800 \mathrm {~mm} ^ { 3 }$
D) $9200 \mathrm {~mm} ^ { 3 }$