If $\left(\frac{x^{2}}{yz}\right) + \left(\frac{y^{2}}{zx}\right) + \left(\frac{z^{2}}{xy}\right)$ = 3, then what is the value of$ \left(x + y + z\right)^{3}$?

If $\left(\frac{x^{2}}{yz}\right) + \left(\frac{y^{2}}{zx}\right) + \left(\frac{z^{2}}{xy}\right)$ = 3, then what is the value of$ \left(x + y + z\right)^{3}$?
1). 0
2). 1
3). 2
4). 3

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