Plot a 3D matrix

I have a 3D matrix of 27 components of an eigenvector which are field values on a 3x3x3 grid of points. I want Matlab to plot level surfaces of the field values so I get some nested level surfaces. Can anyone help?

n = 5;
G = numgrid3d(n);
A = delsq3d(G);
size = (n-2)^3;
[V,D] = eigs(A,size);
for i = 1:size
    temp = V(i,:);
    temp = reshape(temp, [3,3,3]);
    figure(i)
    plot = surf(temp(1,:,:),temp(:,1,:));
    shading interp;
end

[Walter Roberson]

isosurface(temp, LevelValueGoesHere)

but you will not see anything useful with a 3 x 3 x 3 area.

[Sana Ahmed]

Thanks, this worked perfectly!