If \[\frac{1}{m}+\frac{1}{n}=-3\] and\[mn=-\frac{1}{54}\], then find the value of\[\frac{1}{{{m}^{3}}}+\frac{1}{{{n}^{3}}}\].

If \[\frac{1}{m}+\frac{1}{n}=-3\] and\[mn=-\frac{1}{54}\], then find t

1.	If \[\frac{1}{m}+\frac{1}{n}=-3\] and\[mn=-\frac{1}{54}\], then find the value of\[\frac{1}{{{m}^{3}}}+\frac{1}{{{n}^{3}}}\].
A.	\[\frac{1}{212}\]
B.	-513
C.	\[-\frac{1}{219}\]
D.	517
E.	None of these
Answer» C. \[-\frac{1}{219}\]