Why I am unable to use 3-D interpolation ? I have data for a few points and I want to use it for interpolation for all the points in betwwen?

The code is as follows:

cylinder_1=[2,8]; speed=[0,800,1000]; power=[1,137,155]; Values(:,:,1)=[0,0,0;0,2,8]; Values(:,:,137)=[0,0,0;0,-4,0]; Values(:,:,155)=[0,0,0;0,0,-7]; [X,Y,Z]=meshgrid(speed,cylinder,power);

V=interp3(X,Y,Z,Values,2,800,137);

When I use interp3 function, I get the following error message:

Error using griddedInterpolant The grid was created from grid vectors that were not strictly monotonic increasing.

Error in interp3 (line 142) F = griddedInterpolant(X, Y, Z, V, method,extrap);

When I use the command "griddedInterpolant" instead of "interp3" I get the following error message:

Error using griddedInterpolant The number of input coordinate arrays does not equal the number of dimensions (NDIMS) of these arrays.

Basically, I have values only for 2 cylinders, 3 speeds and 3 powers. I want to linearly interpolate for rest of the data between these values.