To find the metal, we need to calculate its density (ρ) using the formula:

$$ρ = \frac{mass}{volume}$$

Now, substitute the given values:

$$ρ = \frac{61.0 g}{5.40 cm^3}$$

$$ρ ≈ 11.296 g/cm^3$$

Comparing this density with the densities of various metals, we find that it closely matches the density of aluminum.

Therefore, the metal with a mass of 61.0 g and a volume of 5.40 cm³ is Aluminum.